MSA Gas Detection System For Hydrogen Monitoring in Nuclear Power Plants

and Storage Areas

System Contents include:

‣ MSA Ultima X Hydrogen Sensor

‣ Heater

‣ Flow Switch

‣ 4 to 20 mA or Modbus output

‣ Stainless Steel Sample System

Product Description:

MSA Gas Detection sample draw system consists of a stainless steelsample system with an Ultima® X sensor and on-board LED’s to provide local alarms.

Applications:

‣ Nuclear Power Plants Boiling Water Reactor (BWR)

‣ Storage Areas for Nuclear Rods and Waste

Note: This bulletin contains only a general description of the products shown.While uses and performance capabilities are described, under no circumstances shall the products be used by untrained or unqualified individuals and not untilthe product instructions including any warnings or cautions provided have been thoroughly read and understood. Only they contain thecomplete and detailed information concerning proper use andcare of these products.

ID 07-20133-MC / August 2011© MSA 2011 Printed in U.S.A.

Corporate Center1000 Cranberry Woods Drive, Cranberry Township, PA 16066 USAPhone 724-776-8600www.MSAnet.com

U.S. Customer Service CenterPhone 1-800-MSA-2222Fax 1-800-967-0398

MSA CanadaPhone 1-800-672-2222Fax 1-800-967-0398

MSA Mexico Phone 01 800 672 7222Fax 52-44 2227 3943

MSA International Phone 724-776-8626 Toll Free: 1-800-672-7777 FAX 724-741-1559

Offices and representatives worldwideFor further information:

The zirconium in Zircaloy cladding used in fuel rods, through oxidation with steam, can produce hydrogen, particularly when therods over-heat during adverse conditions. Hydrogen, when mixed with air, is highly flammable and its detonation or deflagration maydamage the reactor containment.

To avoid such catastrophic events, the MSA Gas Detection system canbe used to measure hydrogen in the off gas re-combiner in BWR’s andalso in the long term storage areas of spent zirconium fuel rods.

The system measures hydrogen in the range of 0 – 100% LEL (4% byvolume). Other ranges are available. A 4 to 20 mA output or Modbusoutput is available to send signals to the control room. Relays are available for the local alarm.

Specifications:

‣ Tested to seismic load requirements IBC-2008 and ASCE-7-05.

‣ Designed following Quality Assurance Requirements forNuclear Facility Applications, 2000 NQA-1, ASME B31.3 and NFPA 70 standards.

‣ NEMA 4X as defined by NEMA 250, Enclosures for Electrical Equipment, 2003.

‣ The Ultima X combustible (hydrogen) sensor is SIL 2 Certified.

‣ Heated enclosure.

‣ Operational temperature range of -30 to +50 C.

‣ Designed to withstand short-term exposure to 75C and 110 PSIG.

‣ All wetted parts are stainless steel.

‣ Flow switch contacts for indication of loss of flow.

‣ Three (3) levels of gas alarm: caution, warning and alarm, in addition to trouble relay.

‣ 4 to 20 mA output to control panel or DCS. Modbus output also available.

‣ Sample can be vented back to the process or storage container.

‣ Product of US.